Java Core Data Structures and Hashing Concepts

Exploring one of the most powerful concepts in Java — Polymorphism, and I achieved it using Inheritance with a simple Plane program. In Java, polymorphism allows a single object to take multiple forms. Using inheritance and method overriding, I implemented a Plane example where different types of planes (like Cargo Plane and Passenger Plane) show different behaviors even though they share a common parent class. It was really interesting to see how a parent class reference can call different implementations at runtime — making the program dynamic and flexible. A big thank you to TAP Academy for teaching this concept so clearly and effortlessly. The real-time examples, like the Plane program, made it much easier to understand how inheritance and polymorphism work together. Excited to apply these concepts in real-world projects and keep growing 🚀 #Java #OOP #Polymorphism #Inheritance #CodingJourney #Learning #SoftwareDevelopment #TAPAcademy

🚀 Day 59 at Tap Academy – Core Java Journey Today’s session was all about diving deeper into Maps and their working in Java. 🔹 Explored Map concepts in detail 🔹 Learned about EntrySet and Iterators 🔹 Understood methods like hasNext() and traversal techniques 🔹 Studied when and where to use different Map implementations 🔹 Compared before and after JDK 1.2 collections evolution 💡 Also gained clarity on the differences between: Vector vs ArrayList Hashtable vs HashMap Dictionary vs Map Understanding these concepts helped me see how Java collections evolved and how to choose the right data structure based on requirements. 📚 Every day is a step closer to becoming a better Java developer! #Java #CoreJava #LearningJourney #TapAcademy #Programming #JavaCollections #DeveloperGrowth

🚀 Day 31 at Tap Academy | Java Full Stack Development Today’s learning was all about Inheritance in Java – one of the core concepts of Object-Oriented Programming (OOP). 🔹 What is Inheritance? Inheritance allows one class to acquire the properties and behavior of another class, promoting code reusability and better structure. 💡 Key Advantages: ✔ Code Reusability ✔ Reduces Development Time & Effort ✔ Improves Maintainability 📚 Types of Inheritance in Java: 1️⃣ Single Inheritance 2️⃣ Multilevel Inheritance 3️⃣ Hierarchical Inheritance 4️⃣ Hybrid Inheritance ✨ Also learned that java.lang.Object is the root of all classes in Java. 📈 Every day is a step closer to becoming a better developer! #Java #OOP #Inheritance #LearningJourney #FullStackDevelopment #TapAcademy #100DaysOfCode #HarshitT

🚀 Day 56 at Tap Academy – Core Java Journey Today’s session was focused on ArrayDeque in Java. I learned how ArrayDeque works as a dynamic array-based implementation of a double-ended queue (Deque), allowing insertion and deletion from both ends efficiently. 🔹 Key Takeaways: • Difference between Queue and Deque • Methods like addFirst(), addLast(), removeFirst(), removeLast() • Faster performance compared to Stack and LinkedList in many scenarios • Real-time use cases of ArrayDeque Consistent learning and hands-on practice are helping me strengthen my Java fundamentals step by step 💻 #Day56 #TapAcademy #CoreJava #JavaLearning #ArrayDeque #ProgrammingJourney #FutureDeveloper

📘 Revised Logic Building in Java with @LetsUpgrade (Day 2) Attended Day 2 of the Java Bootcamp, which focused on strengthening problem-solving and logic building skills. 🔹 Topics revised: • Conditional Statements (if, else, else-if) • Loops (for, while) • Arrays • Strings and basic functions 💻 Practice: Worked on basic problems and received homework to improve coding skills Revisiting these concepts is really helping me improve my logic and confidence in Java. Looking forward to learning more! #LetsUpgrade #Java #Programming #Coding #JavaBasics #LogicBuilding #LearningJourney #DeveloperJourney

📘 Day 41 of My Learning Journey Today, I explored two important methods from the java.lang package: getClass() and toString(). 🔹 getClass() Method This method is used to get the runtime class of an object. It helps in understanding the exact class an object belongs to during execution. 🔹 toString() Method This method converts an object into a readable string format. By default, it returns the class name along with the hashcode, but it can be overridden to display meaningful information. 💡 Learning these methods helped me understand how Java represents objects internally and how we can customize their output for better readability. Step by step, improving my understanding of core Java concepts! 🚀 #Java #LearningJourney #Day41 #OOP #Programming #TechSkills

🚀 Day 55 – Mastering HashSet in Java | Tap Academy Today, I explored one of the most important concepts in Java Collections – HashSet. 🔹 What I learned: HashSet is used to store unique elements (no duplicates) Internally works using Hash Table + Hash Function (Hashing) Default capacity = 16 buckets Uses Load Factor (75%) to resize dynamically Provides O(1) time complexity for insertion & searching 🔹 Key Highlights: ✔ No duplicate values allowed ✔ Allows heterogeneous data ✔ Allows one null value ✔ Does NOT maintain insertion order (random output) 🔹 Behind the Scenes (Important Concept): Data → Hash Function → Hash Value → Bucket This process is called Hashing, which makes operations super fast ⚡ 🔹 Also learned: Difference between HashSet and LinkedHashSet 👉 HashSet → Random Order 👉 LinkedHashSet → Maintains Insertion Order 💡 Takeaway: HashSet is the best choice when you need fast performance + no duplicates, and order is not important. 📍 Learning TAP Academy with amazing guidance from trainers: Sharath R | Harshit T |kshitij kenganavar #Java #HashSet #CollectionsFramework #FullStackJava #TapAcademy #LearningJourney #DataStructures #JavaDeveloper #Coding

Headline: Exploring the "Leila and Majnu" 👫 of Java ☕ : Exception Handling at TAP Academy 🚀 Java development isn't just about writing code that works; it’s about writing code that doesn't break when the unexpected happens. Today at Tap Academy, we transitioned from the pillars of OOP into the essential world of Exception Handling with Sharath R sir. Key highlights from the session: 🔹 Functional Interfaces: Understanding the architecture behind JDK 8/9 features like Runnable and Comparator. 🔹 Errors vs. Exceptions: Learning to distinguish between faulty coding (Syntax Errors) and faulty inputs (Exceptions) that occur at runtime. 🔹 The Anatomy of a Crash: A deep dive into how the JVM and Runtime System (RTS) manage exception objects to prevent data loss. 🔹 Try-Catch Synergy: Why the try and catch blocks are the "Leila and Majnu" of Java—interdependent and essential for preventing abrupt program termination. Exception handling is the difference between a professional, resilient application and one that frustrates users with "App Not Responding" pop-ups. Looking forward to tomorrow's "twist" in the story as we explore multiple catch blocks! Sharath R TAP Academy #Java #Programming #TapAcademy #ExceptionHandling #SoftwareDevelopment #TechLearning #JavaFullStack #OOP #CodingLife

Continuing my Java learning journey, I’ve recently explored some important concepts that are widely used in real-world applications and everyday coding. Here are the topics I covered: Strings and their immutability, along with commonly used methods LocalDate for handling dates in a clean and modern way using the Java Time API Wrapper Classes and how they bridge primitive types with objects Generics for writing type-safe and reusable code These concepts gave me a clearer understanding of how Java handles data, improves type safety, and simplifies common programming tasks. Gradually building a strong foundation to write cleaner, more efficient, and scalable Java applications. #Java #Programming #Generics #LearningJourney #SoftwareDevelopment #CDAC

🚀 Day 44 of My Learning Journey Today I explored some important concepts in Java related to memory management and threading. Here’s what I learned: 🔹 Finalize Method Used before an object is garbage collected. Helps in performing cleanup activities like closing resources. However, it's not reliable and is now considered outdated in modern Java practices. 🔹 Mark and Sweep Algorithm A key technique used in Garbage Collection. Mark Phase: Identifies objects that are still in use. Sweep Phase: Removes unused objects from memory. Improves memory efficiency and prevents memory leaks. 🔹 Garbage Collector Automatically manages memory by removing unused objects. Helps developers focus more on logic rather than memory handling. Works in the background for better performance. 🔹 Daemon Thread A low-priority thread that runs in the background. Supports main threads (e.g., garbage collection). Automatically stops when all user threads finish execution. 💡 Key Takeaway: Understanding how memory is managed and how background threads work is crucial for writing efficient and optimized Java programs. #Java #GarbageCollection #Multithreading #LearningJourney #Programming #Developer